AndroidVideoDecodeAccelerator can now render to a SurfaceView

content/common/gpu/media/avda_codec_image.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_AVDA_CODEC_IMAGE_H_
 #define CONTENT_COMMON_GPU_MEDIA_AVDA_CODEC_IMAGE_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "content/common/gpu/media/avda_shared_state.h"
 #include "ui/gl/gl_image.h"
 
 namespace content {
 
-// GLImage that renders MediaCodec buffers to a SurfaceTexture as needed
-// in order to draw them.
+// GLImage that renders MediaCodec buffers to a SurfaceTexture or SurfaceView as
+// needed in order to draw them.
 class AVDACodecImage : public gl::GLImage {
  public:
   AVDACodecImage(const scoped_refptr<AVDASharedState>&,
                  media::VideoCodecBridge* codec,
                  const base::WeakPtr<gpu::gles2::GLES2Decoder>& decoder,
                  const scoped_refptr<gfx::SurfaceTexture>& surface_texture);
 
  protected:
   ~AVDACodecImage() override;
 
@@ skipping 23 matching lines @@
 
   // Return the codec buffer that we will return to the codec, or
   // <0 if there is no such buffer.
   int GetMediaCodecBufferIndex() const;
 
   // Set the size of the current image.
   void SetSize(const gfx::Size& size);
 
   void SetMediaCodec(media::MediaCodecBridge* codec);
 
-  void setTexture(gpu::gles2::Texture* texture);
+  void SetTexture(gpu::gles2::Texture* texture);
 
  private:
+  enum { kInvalidCodecBufferIndex = -1 };
+
   // Make sure that the surface texture's front buffer is current.
   void UpdateSurfaceTexture();
 
   // Attach the surface texture to our GL context, with a texture that we
   // create for it.
   void AttachSurfaceTextureToContext();
 
   // Install the current texture matrix into the shader.
   void InstallTextureMatrix();
 
   // Shared state between the AVDA and all AVDACodecImages.
   scoped_refptr<AVDASharedState> shared_state_;
 
-  // Codec's buffer index that we should render to the surface texture,
-  // or <0 if none.
+  // The MediaCodec buffer index that we should render. Only valid if not equal
+  // to |kInvalidCodecBufferIndex|.
   int codec_buffer_index_;
 
   // Our image size.
   gfx::Size size_;
 
   // May be null.
   media::MediaCodecBridge* media_codec_;
 
   const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder_;
 
+  // The SurfaceTexture to render to. This is null when rendering to a
+  // SurfaceView.
   const scoped_refptr<gfx::SurfaceTexture> surface_texture_;
 
   // Should we detach |surface_texture_| from its GL context when we are
   // deleted?  This happens when it's using our Texture's texture handle.
   bool detach_surface_texture_on_destruction_;
 
   // The texture that we're attached to.
   gpu::gles2::Texture* texture_;
 
   // Have we cached |texmatrix_uniform_location_| yet?
   bool need_shader_info_;
 
   // Uniform ID of the texture matrix in the shader.
   GLint texmatrix_uniform_location_;
 
   // Texture matrix of the front buffer of the surface texture.
   float gl_matrix_[16];
 
   DISALLOW_COPY_AND_ASSIGN(AVDACodecImage);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_AVDA_CODEC_IMAGE_H_